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Flashcards in Paper 7 Deck (36):
1

Complete the table to name the type of enzyme secreted

enzyme secreted: Product of digestion:
? Maltose
Protease. ?
? Fatty acid & glycerol


enzyme secreted: Product of digestion:
Amylase/carbohydrase Maltose
Protease. Amino acids
Lipase Fatty acid & glycerol

2

The following passage describes the part by funding the carbon cycle. Complete the passage

Many fungi are decomposers and play an important part in the carbon cycle. Decomposition is the…… Of dead organisms, or other organic material, such as bread. The process releases inorganic mineral ions, such as…..., into the air. Decomposition also releases a gas called…….Into the air. This gas is produced by a process called…….., which releases the energy that fungi need to grow. The same gas is taken out of the air by plants and used in a process called…....to make food.

Digestion
Nitrate/phosphate
Carbon dioxide
Respiration
Photosynthesis

3

What is the pale yellow liquid found in blood?

Plasma

4

Give one function of plasma

transport: cells, salts, vitamins, hormones, CO2, urea, digested food

5

Describe how white blood cells protect the body from infection (2 marks)

In golf

Produce antibodies

Destroy/kill/digests pathogens/bacteria

6

Explain why a person who loses a lot of blood quickly could die

Lack of oxygen

Lack of glucose

Lack of respiration

To brain/heart

Low blood pressure

7

Explain how are seedling uses starch as it grows

Digestions/breakdown

Maltose/glucose

Respiration/energy

Synthesis

8

The farmer noticed that small insects could aphids were feeding on the leaves of the tomato plants.

Suggest how the aphids would effect the yield of tomatoes (2 marks)

Reduce yields/less tomatoes

Eat/feed on leave/plant/sugars

Less photosynthesis

9

The farmer noticed that small insects could aphids were feeding on the leaves of the tomato plants.
The farmer releases ladybirds to reduce the number of aphids.

What name is given to this method of reducing the numbers of an insect Pest?

Biological control

10

The farmer noticed that small insects could aphids were feeding on the leaves of the tomato plants.
The farmer uses pesticides reduce the number of insect pests

Describe the disadvantages of using pesticides compared to using biological control (3 marks)

Affects other species

Affects human/poisonous to humans

Affects taste

Food chain disruption

Pollution

Needs reapplication

11

Describe the stages that might have been used to produce a clone (5 marks)

Enucleated Egg cell/egg nucleus removed

Nucleus from Father cell

Electric treatment that/simulation of cell division

Mitosis

Embryo

Uterus/Womb

In Surrogate mother

12

Spain what is meant by the term Homozygous recessive (2 marks)

To alleles both the same

Not dominant

13

Name the two main parts of the central nervous system

Brain

Spinal cord

14

Describe how information from receptors in the nervous system is passed to the central nervous system (2 marks)

Neurones/nerve cells

Electrical/impulses

Synapses

15

A German scientists performed at an experiment in which he Castrated cockerels.

The castrated cockerels grew fatter and developed feathers that made in look like hens rather than Cockerels. Their Behaviour changed and they no longer crowed and were less aggressive.

Suggest why the castrated Cockerel developed a different appearance and behaviour from the normal Cockerel. (3 marks)

Testes removed

No testosterone/no male hormone

No male characteristics

No male secondary sexual characteristics

No Aggression/crowing

16

A German scientist removed the testes from a young Cockerel and then put them into another Cockerel, which had previously been castrated.

Suggest why the castrated cockerel that had testes put into his body developed normally (2 marks)

Testosterone then secreted/released

Into bloodstream

Therefore male characteristics/secondary sexual characteristics

17

A German scientists performed at an experiment in which he Castrated cockerels.

The castrated cockerels grew fatter and developed feathers that made in look like hens rather than Cockerels. Their Behaviour changed and they no longer crowed and were less aggressive.

Farmers have used the results of this experiment to increase meat production. Suggest why castration would lead to an increase in meat production (2 marks)

Chicken fatter

Larger surface area to volume ratio

Less heat loss

Less movement/aggression

18

Describe what happens during the process of ultrafiltration (2 marks)

Small molecules

Leave bladder/enter Bowman's capsule

19

Right what happens during the process of selective (2 marks)

Certain/required substance returns to blood/leaves filtrate

20

Which part of the kidney nephron is used to reabsorb filtered glucose

PCT

21

As a result of exercise on a hot day, there are changes in the volume and concentration of urine.

Describe these changes in urine explain how the changes are brought about. (5 marks)

Less urine/less volume of urine

More concentrated urine/less water in urine

Sweating

Concentration of blood increases

Stimulated pituitary/hypothalamus

ADH released

Increases permeability of collecting duct/water reabsorbed

22

Completely table show the differences between insects pollinated and wind pollinated flowers

Feature: Insect P: Wind P:
Petals. Large & colourful.

Scent

Nectar

Pollen grains

Stigma. Feathery & out of petal

Feature: Insect P: Wind P:

Petals. Large & colourful. small/colourless

Scent. Scented. No scent

Nectar. Present None

Pollen grains. Large/sticky. Small/light

Stigma.Sticky&enclosed Feathery&out of petal

23

Pollen grains contain male gametes and ovules contain female gamete.

Explain why the gametes in a single plant a genetically different from each other and also different from the cells in the rest of the (3 marks)

Meiosis

Recombination of alleles

Haploid

Half number of chromosomes

24

Suggest one advantage and one disadvantage of self collimation compared with cross-pollination

Advantage: good chance of pollination

Disadvantage: less variation

25

Complete the table and vitamins and their function

Vitamin: Function: Source:
A
Skin&gum development
D

Vitamin: Function: Source:
A. Night vision. Carrot

C Skin&gum development. Citrus fruit

D. Bone/teeth development. Absorb Ca.

26

In the digestive system where does the following take place:

Change of pH from 7 to 2

Stomach

27

In the digestive system where does the following take place:

Digestion by enzymes (3 marks)

Mouth, stomach, small intestine

28

In the digestive system where does the following take place:

Absorption (4 marks)

Small intestine, large intestine, stomach, mouth

29

In the digestive system where does the following take place:

Egestion

H

30

Describe two ways in which bile helps digestion

Emulsification of fats/lipids

Optimum pH/neutralises acid

31

Farmers often use fertilisers on their fields. Explain the biological consequences that occur when mineral ions from fertilisers are leached from the soil and washed into a lake (5 marks)

Eutrophication

Nitrate/phosphate

Growth of water plants/algal bloom

less light/less photosynthesis

Bacteria/microorganism/respiration

Less oxygen/oxygen used

Fish/animals ie

32

Suggest why it is unusual to find food chains of more than five trophic levels (3 marks)

Energy loss

movement/respiration/ excretion/digestion

Little energy reaches the top

33

Give one reason my fish are an important food source for humans

Protein/omega 3/fats

34

Fish are an important food source for humans and fish farming now provides an increasing proportion of the fish we eat. This is because fish farming has many advantages compared to trying to catch fish in the wild.

Give two ways in which fish farmers maintain water quality. In each case explain how it is achieved.

Oxygen
Stirring/paddles

Clean/remove waste/Algae

Prevent buildup of food
feed in small/regular amounts

Control disease/bacteria/remove dead fish/use antibiotic

35

Suggest three ways in which a fish farmer might cause harm to the local ecosystem.

Release mineral ion/Faeces/waste

Release of chemicals

Release of bacteria

Disease can infect wild fish

Attract predators

Habitat destruction by flooding/building etc.

36

Give two advantages of fish farming compared to catching fish in the wild

More likely to catch/Guaranteed harvest

No need to buy boat/fuel/employing/nets

Not dangerous

All same species/size/health/condition

Not depleting wild fish stocks

No overfishing/conserving endangered species

Selective breeding